gilbert



(No Model.)

H. J. GILBERT.

ROLLER MILL.

Patented Apr. 24, 1883.

V UNITED STATES PATENT OFFICE.

HENRY J. GILBERLOF RAOINE, WISCONSIN, ASSIGNOR OF ONE-HALF TO G. A. GILBERT, OF SAME PLACE.

ROLLER-MILL.

SPECIFICATION forming part of Letters Patent No. 276,237, dated April 24, 1883. Application filed October 27, 1882. (No model.)

To all whom it may concern:

Be it known that I, HENRY J. GILBERT, of Racine, in the county of Racine, and in the State of Wisconsin, have invented certain new and usefullmprovements in Roller-Mills; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates to roller-mills; and it consists in an improved device for adjusting and supporting the rollers, as willhereinafter be fully described.

In the drawings, Figure l is a side view of sufficient of a roller-mill to illustrate my invention, and Figs. 2 and 3 are details.

A A are the uprights of one end of amachine, and A A are those of the other end, these uprights being duplicated on the other side of the machine.

B are the fast and B the slow rollers. The slow rollers B have stationary hearings in the frame at B but the fast rollers B have their hearings in the upper ends of swinging arms a, that pass down through slots in the crossbars A that connect the uprights at'each end of the machine, and these armsare pivoted upon short shafts (J, on which are keyed eccentrics c, that'fit in round openings in the cross-bars A and are tightened therein by nuts, and when I desire to raise or lower an end of one of the rolls B, I loosen the nut and turn the eccentric bolt on that end either to the right or left, according to whether the adjustment is to be up or down. If the end is to be lowered, I turn to the right, so as to bring the thinnest portion of the eccentrics underneath' and to raise it a further turn will carry the thickest portions underneath, just asa turn to the left would, and therefore I may adjust either end of a roller, or may lift the roll bodily,and firmly secure the eccentric bolts in their adjustment by tightening their nuts. The bolts 0 pass loosely through the arms a and form their pivots.

D is a shaft that connects the lower ends of arms a, which are bifurcated to form jaws a a, and between the jaws a. a of each arm I key or otherwise fasten an eccentric, O, that has its bearing in the eye of a screw-bolt, E, and

I screw the shouldered end 0 of a shaft, E, upon the shank e of the eyebolt E, and then I pass this shaft E through a sleeve, E, that fits loosely in an aperture or housing, H, in the corner uprightof the machine. The sleeve E has a square should-er, g, on its inner end, that fits in a corresponding depression in the inner face of theupright, and the said sleeve E is screw-threaded at its outer end. From a shoulder, h, outward the housing H is made of sufi'icient diameter to permit a spiral spring, H", to he slipped in on the sleeve E and this springis confined in place by a washer, h, and a not, If, and upon the end of shaft E, that projects through the sleeve E, I secure a jamnut,f, by which the shaft E may be turned to screw its shouldered end 6 back and forth on the shank e of eyebolt E to increase or decrease the distance between its eye and the shouldered end 6" of shaft E, and in this way I draw the lower end of arm a back and forward to set the roller B at the proper distance from the roller B to suit the grain to be reduced.

On each or either end of shaft D, I key an arm, F, and I connect this arm F with a corresponding arm on the shaft D of the fast roller at the opposite end of the machine by a rod, Gr, having handles G, and therefore when I desire to entirely separate the fast from the slow rollers in a series I have but to throw the rod G in the direction of the arrow, and this will revolve shaft D and cause the heavier portion of eccentric G to wedge the shaft D and the lower end of arm u out from the outer upright, and consequently carry the rollerB away from roller B. This action would be against the force of spring H, the tension of which may be regulated by screwing the nut k in upon the washer h. Should the rolls encounter any substance too hard for reduction, the spring H will permit the sleeve E to slide in the direction of the strain on shaft D, and the roller B will also yield and permit the foreign matter to drop through.

In Fig. lot the drawings I have shown only one side of one series of rolls, with the rest of the machine broken away, as Imake both sides of my machine exactly alike with respect to my present invention. I connect the arms of the bearings of the fast rolls of each series by shafts D, arms F, and a rod, G;

What 1 claim as my invention, and desire to 5 secure by Letters Patent, is

1. The swinging bearing-arms, in combination with shafts D, eccentrics O, eyebolts E, the shafts E 6', and yielding connections, substantially as set forth.

1o 2. The combination of arms a, shafts D, ec- I centrics G, eyebolts E, yielding shaft E, arms F, and rod Gr, as set forth.

In testimony that I claim the foregoing I have hereunto set my hand, on this 10th day of October, 1882, in the presence of two wit- 1 nesses. I

HENRY J. GILBERT. Witnesses: A

QUINCY OoRwm, LEwIs J. BOWMAN. 

